Watershed area between SMA & IMA which commonly result in ischemia is

During times of blockage of one of the aeries that supply the watershed area, such as in atherosclerosis, these regions are spared from ischemia by viue of their dual supply. However, during times of systemic hypoperfusion, such as in disseminated intravesicular coagulation or hea failure, these regions are paicularly vulnerable to ischemia by viue of the fact that they are supplied by the most distal branches of their aeries, and thus the least likely to receive sufficient blood. Watershed areas are found in the brain, where areas are perfused by both the anterior and middle cerebral aeries, and in the intestines, where areas are perfused by both the superior and inferior mesenteric aeries